import { GraphQLFieldConfigArgumentMap, GraphQLList } from "graphql";
import { MappedDataSource } from "./MappedDataSource";
import { MappedMultiSourceOperation } from "./MappedMultiSourceOperation";
import * as types from "./utils/types";
import { SourceAwareOperationResolver } from "./SourceAwareOperationResolver";
import { OperationType } from "./operation-types";
/**
 * @api-category MapperClass
 */
export declare class MappedMultiSourceUnionQueryOperation<TSrc extends MappedDataSource, TArgs extends {}> extends MappedMultiSourceOperation<TSrc, TArgs> {
    mapping: MappedMultiSourceOperation<TSrc, TArgs>["mapping"] & {
        unionMode: "union" | "unionAll";
    };
    constructor(mapping: MappedMultiSourceOperation<TSrc, TArgs>["mapping"] & {
        unionMode: "union" | "unionAll";
    });
    defaultResolver<TResolved>(ctx: any): SourceAwareOperationResolver<any, any, TArgs, TResolved>;
    get defaultArgs(): GraphQLFieldConfigArgumentMap;
    operationType: OperationType;
    get dataSources(): MappedDataSource<any>[];
    get name(): string;
    get outputTypeName(): string;
    get type(): import("graphql").GraphQLScalarType | import("graphql").GraphQLInterfaceType | import("graphql").GraphQLUnionType | import("graphql").GraphQLEnumType | GraphQLList<any> | import("graphql").GraphQLObjectType<types.SourceFromTypeSpecMapping<import("./utils/util-types").Dict<types.AnyTypeSpec>>, any>;
}